US2025197602A1PendingUtilityA1

Resin composition for vehicle coolant transport tube and vehicle coolant transport tube

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Assignee: SUMITOMO RIKO CO LTDPriority: Dec 23, 2022Filed: Feb 27, 2025Published: Jun 19, 2025
Est. expiryDec 23, 2042(~16.4 yrs left)· nominal 20-yr term from priority
Inventors:Masashi OkahisaKoji Mizutani
F16L 9/12C08K 5/1345F16L 11/04C08L 53/00C08L 23/10C08K 5/375
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Claims

Abstract

Provided are a resin composition for a vehicle coolant transport tube having excellent heat resistance and extraction resistance; and a vehicle coolant transport tube obtained by using this resin composition. The resin composition for the vehicle coolant transport tube includes a component (A): a polypropylene resin having a melt-flow rate of not less than 0.2 g/10-min and less than 2.0 g/10-min and having a melting point of not lower than 145° C., wherein the melt-flow rate is measured at 230° C. with a load of 2.16 kg; and a component (B): an antioxidant having a melting point of not lower than 60° C., wherein a content of the component (B) relative to 100 parts by mass of the component (A) is 0.1 to 1 part by mass.

Claims

exact text as granted — not AI-modified
1 . A resin composition for a vehicle coolant transport tube, the resin composition comprising:
 a component (A): a polypropylene resin having a melt-flow rate of not less than 0.2 g/10-min and less than 2.0 g/10-min and having a melting point of not lower than 145° C., wherein the melt-flow rate is measured at 230° C. with a load of 2.16 kg; and   a component (B): an antioxidant having a melting point of not lower than 60° C.,   wherein a content of the component (B) relative to 100 parts by mass of the component (A) is 0.1 to 1 part by mass.   
     
     
         2 . The resin composition for a vehicle coolant transport tube according to  claim 1 , wherein the component (A) is a propylene-α-olefin block copolymer. 
     
     
         3 . The resin composition for a vehicle coolant transport tube according to  claim 1 , wherein the melt-flow rate of the component (A) is not less than 0.2 g/10-min and not more than 1.5 g/10-min. 
     
     
         4 . The resin composition for a vehicle coolant transport tube according to  claim 1 , wherein the melting point of the component (B) is not lower than 90° C. 
     
     
         5 . The resin composition for a vehicle coolant transport tube according to  claim 1 , wherein the component (B) is a phenol-type antioxidant. 
     
     
         6 . The resin composition for a vehicle coolant transport tube according to  claim 1 , wherein the component (B) is a hindered-phenol-type antioxidant. 
     
     
         7 . A vehicle coolant transport tube, comprising the resin composition for a vehicle coolant transport tube according to  claim 1 .

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